Apparatus for molding abrasive strips



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APPARATUS FOR MOLDING ABRASIVE STRIPS.

No. 428,298 Patented May 20, 1890.

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Q. W. 85 I. E. BOOTH. APPARATUS FOR MOLDING ABRASIVE' STRIPS.

v No. 428,298. Patented May 20, 1890.

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Q. W. & I. EQBOOTH. APPARATUS FOR MOLDING ABRASIVE STRIPS.

No. 428,298. Patented May 20,- 1890.

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UNITED STATES PATENT OFFICE.

QUENTIN IV. BOOTH AND IRVING E. BOOTH, OF ROCHESTER, NE\V YORK.

APPARATUS FOR MOLDING ABRASIVE STRIPS.

SPECIFICATION forming part of Letters Patent No. 428,298, dated May 20, 1890.

Application filed September 24, 1889. Serial No. 324,963. (No model.) i

To all whom it may concern.-

Be it known that we, QUENTIN W. BOOTH and IRVING E. BOOTH, citizens of the United States, residing at Rochester, in the county of Monroe and State of New York, have invented certain new and useful Improvements in Apparatus for Molding Abrasive Strips, of which the following is a description.

Our improvement relates to an apparatus for molding sand-paper strips or other abrasive fabrics into convex form, to be attached to the convex periphery of wheels used in finishing the heels and shanks of boots or shoes preparatory to burnishing. The paper for this purpose is molded with its outside or abrasive surface in convex form both longitudinally and in cross-section. In other machines of this kind the strip of paper is run around wheels and molded by a constant and unvarying movement forward.

' In our invention the paper is molded by an intermittent action and by successive movements of the molding-wheel against a concave pressing or finishing block, the paper being held stationary on opposite sides of the v inoldin g-wheel while thelatter moves forward,

the top in Fig. 1.

thus properly stretching the paper before the pressing action takes place. By thus molding the paper while it is held stationary its abrasive qualityis not injured, and by the square action of the finishing-block the wrinkles at the edges are more uniformly distributed and a better quality of paper obtained.

In the'drawings, Figure 1 is a plan view of the machine. ing in the direction of the arrow at the bottom in Fig. 1. tion looking in the direction of the arrow at Fig. 4 is a diagram showing an enlarged plan view of the apparatus for molding the strip. Fig. 5 is a detail view showing a side elevation of the apparatus for giving motion to the feed-wheel. Fig. 6 is a horizontal section in line a: 00 of Fig. 5. Fig. 7 is a cross-section of the molded strip.

A indicates the main frame having a table or bed A, on which the working parts are mounted.

B is a sub-frame holding the working parts.

0 is a wheel forming the reel on which the strip of paper a is wound preparatory to being molded.

Fig. 2 is a side elevation look- Fig. 3 is a similar side eleva- D is a moistening-wheel covered with cloth, over which the strip passes. These wheels are connected by a band I), that runs around pulleys c c, by which means the moisteningwheel D revolves in opposition to the passage of the paper overit. The surface of the paper is thereby more effectively moistened than it would be if it ran in the same direction with the paper.

E is a water-tank, into which the moistening-wheel dips to take up water to moisten the smooth side of the paper.

F'is a guide-wheel attached to table A, so as to revolve freely. The strip of paper, after leaving the moistening-wheel, passes around this wheel, being turned up edgewise in a vertical position.

G is another guide-Wheel, which we denominate the clamp-wlneel, attached to frame B and turning freely. The strip passes from wheel F to wheel G and between projecting flanges of the latter, whichkeep it in position.

H is the molding-wheel by which the paper strip is molded in the convex form shown in the cross-section, Fig. 7. This'wheel is convex on its rim, and is hollow and provided with draft-openings d d, Fig. 4, to allow the combustion of gas inside to heat the wheel. The gas is supplied through a pipe f, which opens into the hollow on the under side. From the clamp-wheel G the strip passes to and around the molding-wheel H, and thence, after being crimped by the means hereinafter described, it-falls in coiled form into areceptacle 1, Figs. 2 and 3, which receives intermittent rotary motion with the other apparatus and prevents the coiled strip from kinking or clogging.

Motion may be imparted to rccept-aclel by any suitablemeans, that shown in the drawings being a driving-pulley 0 from which proceeds a crossed band d passing around a pulley f on a shaft g On the lower end of the shaft is another pulley 71 from which proceeds an uncrossed band i to a pulley on the lower end of the receptacle.

The molding-wheel H has free turning movement on its axis and revolves while the paper is being fed, and is attached to aswinging arm J, Fig. 4, that turns freely on a vertical shaft or spindle K.

L is a pressing or finishing block standing back of the molding-wheel H and serving to press the edges of the paper against the moldin g-wheel. This block is provided with a concave face to fit wheel II, and is movable toward and from the molding-wheel, being attached t-o a crank-shaped arm M, Figs. 4 and 5, that turns freely on the shaft or spindle K.

N is a feed-wheel attached to the shaft K, its periphery covered with leather or other suitable material and coming in contact with the rim of the molding-wheel and giving motion to the same. The pressure between the molding-wheel H and the feed-wheel N is adjusted by the spring and screw 3.. The spring rests in a slot of the arm J, and the shaft K passes through the slot. The spring presses against a box which rests around the shaft and has a tendency to draw the arm J endwise, thus bringing the molding-wheel against the feed-wheel. The tension of the spring is regulated by the screw. By the intermittent turning movement of the feed-wheel the strip of paper is drawn along after it has been molded, as before described.

0, Figs. 1 and 4, is a rocklever pivoted at h to the frame B and provided with a clamp i, with a concave inner end that bears against the c1a1np-wheel G and operates intermittently to clamp the strip of paper that passes around-the wheel and release it, so thatit can be drawn forward.

The apparatus is driven by suitablemeans,

one form of which is shown in the drawings.

P is the driving-shaft, having thereon a fixed spur-pinion 70. This pinion engages with a spur-gear Z, attached to a second shaft Q. On the shaft Q is an eccentric that gives mot-ion toa strap 6, connected at the outer end with the swinging arm J, by which means reciprocatin g motion forward and back is given to the molding-wheel H. The spring 5 in the end of strap erelieves any excessive pressure between the molding-wheel H and the block L. 011 the same shaft Q is a cam m, that strikes a roller n, attached to the lower end of arock-arm 0. To the lower end of this rock arm is pivoted a connecting-rod p, jointed at the. opposite end to the arm M, that carries the pressing-block L. By this means said block is thrown forward, and it is retracted by aspring q, attached to the arm and connected with the frame in the rear. 0n the same shaft Q is a cam r, Fig. 3, that strikes a roller .5 on, a rock-arm t, pivoted at its lower end to the main frame. To this rock-arm is pivoted a connecting-rod 10, attached at the other end to the rock-lever O, by which means theclamp t' is operated. On the same shaft Q is acrank 1*, Figs. 1 and 2, to which is pivoteda pitman 20, extending down and jointed at the lower end to a stiff V-shaped crank-arm z, pivoted at a? to the main frame. To the outer end of the crank-arm z is pivoted a connecting-rod 0 which is jointed at the outer end to a rock-arm (1 Figs. 5 and 6, turning freely on the spindle K. To the under side of the rock-arm d is attached a pawl f that against the finishing-block L the paper is stretched and crimped into circular form longitudinally and in cross-section, as shown in cross-section, Fig. 7. During the forward movement of said molding-wheel to meet the block the two ends of the loop of the paper strip are held stationary, one end being firmly held by the clamp t'pressing against wheel G, and the other end being held by the feedwheel N bearing against the periphery of the molding-wheel, the feed-wheel being at that time stationary. The effect is therefore to stretch the center of the paper strip between the clamp 2' and the feed-wheel N by the for: ward movement of the molding-wheel sufliciently to make it taut, but without tearing or breakingit. As soon as one crimping action has taken place the strip is released and is ready to be fed forward again. The strip is released by the disengagement of clamp 4' from the guide-wheel G, and at the same time the molding-wheel H- is drawn back,,which leaves the strip free to be drawn forward. It is drawn forward by the feed-wheel N, which preserves its bearing against the moldingwheel as the latter is drawn back. The action is thus intermittent, the crimping being done by successive movements instead of by a continuous action. By this means the crimping action is more effective and the edges of the paper are smoother and freer of wrinkles, as greater pressure is applied.

Having described our invention, what we claim as new, and desire to secure by Letters Patent, is

1. In a machine for molding abrasive strips, the combination of a clamp-wheel, an intermittent clamp operating in connection therewith, a molding-wheel movable forward and back, and an intermittent feeding-wheel resting against the molding-wheel, as and for the purpose specified.

2. In a machine for molding paper strips,

the combination, with a guide-wheel on one side and a feed-wheel on the other, of a molding-wheel receiving intermittent motion forward and back, and a finishing-block to press against the molding-wheel, as herein shown and described.

3. In a machine for molding paper strips, the combination of a finishing-block provided with a concave face, and an intermittentlymovable molding-wheel provided with a; convex periphery, as and for the purpose speci- 5. The combination, with the clamp-Wheel- G, of the pivoted rock-lever 0, provided with 10 the clamp 2 the connecting-rod u, rock-arin 25, and cam r, as and for the purpose specified.

6. The combination, with the finishingblock L, provided with the arm. M, of theconnecting-rod p, the rock-arm 0, cam 'm, and retracting-spring, as and for the purpose I 5 specified.

In witness whereof we have hereunto signedour names in the presence of two subscribing witnesses.

QUENTIN \V. BOOTH. IRVING E. BOOTH. \Vitnesses:

R. F. OSGOOD, WM. J. MCPHERSON. 

